Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 443

ONVOY, LLC - MD 8

NEW CINGULAR WIRELESS PCS, LLC - DC 4

VERSATEL LLC 1

OPENTACT INC. 1

LEVEL 3 COMMUNICATIONS, LLC - MD 1

New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2017-11-09	443-348-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	WOODLAWN	MD
2017-11-09	443-754-6XXX	6000–6999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	SALISBURY	MD
2017-10-27	443-346-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SEVERNA PK	MD
2017-10-27	443-346-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SEVERNA PK	MD
2017-10-27	443-381-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	REISTERSTN	MD
2017-10-27	443-381-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	REISTERSTN	MD
2017-10-27	443-431-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	RANDALLSTN	MD
2017-10-27	443-431-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	RANDALLSTN	MD
2017-10-27	443-586-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	DUNDALK	MD
2017-10-27	443-586-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	DUNDALK	MD
2017-10-27	443-780-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WOODLAWN	MD
2017-10-27	443-780-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WOODLAWN	MD
2017-10-19	443-795-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SEVERN	MD
2017-10-17	443-628-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2017-10-17	443-946-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PARKVILLE	MD
2017-10-17	443-946-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PARKVILLE	MD
2017-10-17	443-946-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PARKVILLE	MD
2017-10-10	443-347-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	CARDIFF	MD
2017-09-21	443-355-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELLICOTTCY	MD
2017-09-21	443-596-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ESSEX	MD
2017-09-21	443-596-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ESSEX	MD
2017-09-20	443-258-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	EASTON	MD
2017-09-20	443-355-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	ELLICOTTCY	MD
2017-09-20	443-490-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	EDGEWOOD	MD
2017-09-20	443-881-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	REISTERSTN	MD
2017-09-20	443-936-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELKRIDGE	MD
2017-09-19	443-490-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2017-09-19	443-490-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2017-09-13	443-877-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NORTH EAST	MD
2017-09-08	443-358-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	SALISBURY	MD
2017-09-07	443-308-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2017-09-07	443-337-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	SPARROWSPT	MD
2017-09-01	443-530-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	DUNDALK	MD
2017-08-31	443-232-8XXX	8000–8999	Assigned	TELNYX LLC	073H	WILLARDS	MD
2017-08-31	443-233-8XXX	8000–8999	Assigned	TELNYX LLC	073H	VIENNA	MD
2017-08-31	443-239-8XXX	8000–8999	Assigned	TELNYX LLC	073H	EASTON	MD
2017-08-31	443-262-7XXX	7000–7999	Assigned	TELNYX LLC	073H	CENTREVL	MD
2017-08-31	443-434-1XXX	1000–1999	Assigned	TELNYX LLC	073H	FEDERALSBG	MD
2017-08-31	443-437-8XXX	8000–8999	Assigned	TELNYX LLC	073H	POCOMOKE	MD
2017-08-31	443-439-3XXX	3000–3999	Assigned	TELNYX LLC	073H	TRAPPE	MD
2017-08-31	443-448-9XXX	9000–9999	Assigned	TELNYX LLC	073H	DENTON	MD
2017-08-31	443-493-9XXX	9000–9999	Assigned	TELNYX LLC	073H	DELMAR	MD
2017-08-31	443-566-8XXX	8000–8999	Assigned	TELNYX LLC	073H	CHESAPKECY	MD
2017-08-31	443-666-8XXX	8000–8999	Assigned	TELNYX LLC	073H	CHESTERTN	MD
2017-08-31	443-727-4XXX	4000–4999	Assigned	TELNYX LLC	073H	BISHOPVL	MD
2017-08-31	443-888-1XXX	1000–1999	Assigned	TELNYX LLC	073H	PRINCEANNE	MD
2017-08-31	443-972-9XXX	9000–9999	Assigned	TELNYX LLC	073H	CAMBRIDGE	MD
2017-08-21	443-988-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	CENTREVL	MD
2017-07-31	443-358-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	SALISBURY	MD
2017-07-27	443-978-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	SALISBURY	MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.